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ADA4941-1: Single-Supply, Differential, 18-Bit ADC Driver Data Sheet (Rev. D)10/28/2005PDF651 K
Overview
Features and Benefits
- Single-ended-to-differential converter
- Excellent linearity
- Distortion −110 dBc at 100 kHz for VO, dm = 2 V p-p
- Low noise: 10.2 nV/√Hz, output-referred, G = 2
- Extremely low power: 2.2 mA (3 V supply)
- High input impedance: 24 MΩ
- User-adjustable gain
- High speed: 31 MHz, −3 dB bandwidth (G = +2)
- Fast settling time: 300 ns to 0.005% for a 2 V step
- Low offset: 0.8 mV maximum, output-referred, G = 2
- Rail-to-rail output
- Disable feature
- Wide supply voltage range: 2.7 V to 12 V
- Available in space-saving, 3 mm × 3 mm LFCSP
Product Details
The ADA4941-1 is a low power, low noise differential driver for analog-to-digital converters (ADCs) up to 18 bits in systems that are sensitive to power. The ADA4941-1 is configured in an easy-to-use, single-ended-to-differential configuration and requires no external components for a gain of 2 configuration. A resistive feedback network can be added to achieve gains greater than 2. The ADA4941-1 provides essential benefits, such as low distortion and high SNR that are required for driving high resolution ADCs.
With a wide input voltage range (0 V to 3.9 V on a single 5 V supply), rail-to-rail output, high input impedance, and a user-adjustable gain, the ADA4941-1 is designed to drive single-supply ADCs with differential inputs found in a variety of low power applications, including battery-operated devices and singlesupply data acquisition systems.
The ADA4941-1 is ideal for driving the 16-bit and 18-bit PulSAR® ADCs, such as the AD7687, AD7690, and AD7691. The ADA4941-1 is manufactured on Analog Devices, Inc., proprietary, second-generation, eXtra fast complementary bipolar (XFCB) process, which enables the amplifier to achieve 18-bit performance on low supply currents.
The ADA4941-1 is available in a small 8-lead LFCSP as well as a standard 8-lead SOIC and is rated to work over the extended industrial temperature range, −40°C to +125°C.
Applications
- Single-supply data acquisition systems
- Instrumentation
- Process control
- Battery-power systems
- Medical instrumentation
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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UG-474: Evaluation Board for Differential Amplifiers Offered in 8-Lead SOIC Packages9/25/2012PDF263 kB
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MT-218: Multiple Feedback Band-Pass Design Example2/10/2012PDF90 K
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SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
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Amplifiers for Video Distribution3/8/2008PDF115 kB
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High Speed Amplifiers Selection Table2/27/2008PDF77 kB
Tools & Simulations
SPICE Models
CIR
ADA4941 SPICE Macro Model
8.52 K
Support & Discussions
ADA4941-1 Discussions
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.